In today's rapidly developing science and technology, fuses are applied in all aspects of people, and the correct selection of fuses is related to the personal and property safety of users! How to choose a fuse correctly? 1. When choosing a fuse, you first need to consider the safety certification of the fuse used in your product. Then, choose its shape and size, rated voltage (usually 250V), and breaking capacity (fast or slow fuse), so that you can preliminarily choose a model. 2. Then select the upper limit and lower limit of the rated current of the fuse based on your circuit, so that you can determine the specific model and current, 3. Then select the fuse for testing and choose the most suitable one. Fuses, also known as fuses, are made of alloys with low melting points. When an overload or short circuit fault occurs in household electrical equipment, the current of the circuit increases, causing the fuse to quickly heat up to the melting point and melt, and timely disconn
Which is the best choice for Shenzhen's self recovery fuses with a wide variety of models and a complete range? The selection of self restoring fuses has always been a classic topic in the electronics industry. On the way to PTC selection, there is always a model that belongs to you, accompanied by the "Six Steps" of ensuring power supply: 1) Determine parameters: standard working current, maximum working voltage, maximum fault current, and maximum working environment temperature; 2) Determine the PTC that can adapt to the maximum working environment temperature and standard working current using a temperature reduction table; 3) Use the electrical characteristic table to verify the maximum electrical rating of the self recovery fuse selected in step 2 and compare it with the maximum working voltage and fault current of the circuit; 4) Determining the action time: In order to provide better protection effect for the circuit, it is crucial to clarify the working time of PTC; 5)
Shenzhen self recovery fuses are widely used for overcurrent protection of power lines, communication lines, and I/O ports in electronic products such as communication, security, industrial, automotive, and consumer products. So, in actual circuit protection, how should we choose the appropriate model of self recovery fuse to achieve the best protection effect? Regarding the selection of self recovery fuses, Baodian Tong will explain to you: Step 1: Determine the standard working current, maximum working voltage, maximum fault current, maximum working environment temperature, action time and other parameters for the normal operation of the protected circuit; Step 2: Determine whether it is a plug-in PTC or a patch PTC based on the characteristics of the protected circuit or product; Step 3: Select PTC products with a withstand voltage level greater than or equal to the maximum working voltage based on the maximum working voltage Step 4: Select the appropriate product specificat
A general fuse consists of three parts: the first is the melt part, which is the core of the fuse and plays a role in cutting off the current when fused. Fuses of the same type and specification in Shenzhen should have the same material, geometric size, and resistance value as small and consistent as possible. It is important to have consistent fusing characteristics; The second is the electrode part, which usually has two important components that connect the melt to the circuit. It must have good conductivity and should not generate obvious installation contact resistance; The third part is the support part, where the melt of the fuse is generally thin and soft. The function of the support is to fix the melt and make the three parts a rigid whole for easy installation and use. It must have good mechanical strength, insulation, heat resistance, and flame retardancy, and should not produce phenomena such as breakage, deformation, combustion, and short circuit during use; The fuses
The operating principle of a fuse is that an overcurrent causes the thermal balance on the melt to be disrupted. When the temperature of the melt rises to the melting point of the metal material, the middle part of the melt changes from solid to liquid. Due to the surface tension and gravity of the metal material suspended in the tube, the liquid part of the melt pulls away from both ends and sags downwards. The voltage caused arcing causes the melt temperature to continue to rise, further arcing and further distance pulling apart, Until the circuit is completely cut off. For SMD fuses, their operating principle is the same. However, due to different structural states, the surrounding of the metal melt is tightly surrounded by the polymer or ceramic materials of its substrate. Even the melted metal cannot contract towards both ends and can only rely on diffusion, infiltration, or absorption towards the surrounding materials. If the overcurrent disappears during this process (such a
Firstly, normal current: Firstly, we must know the fuse that flows through the circuit chip used in normal current. Usually, we need to reduce the difference between the predetermined amount and then follow the selection principle: the normal current must be less than the rated current and the product's derating factor. Secondly, the fusing current: According to UL standards, Shenzhen patch fuses (fuses) should be able to quickly operate at twice the rated current. But in most cases, to ensure reliable fuses, we recommend that the fusing current be greater than 2.5 times the rated current. In addition, the fusing time is very important, and a judgment must also be made based on the manufacturer's fusing characteristics. Thirdly, short-circuit current: the maximum current value, when we call it the short-circuit current of a short circuit. The rated breaking capacity of various fuses is necessary, and we must be careful not to choose fuses with circuit currents exceeding the rated
MB:+86 13924633629 Ms.vicky
E-mail: waimao@xcfuse.com
Factory :
XC Electronics(Shenzhen)Corp.,LTD
Add: Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
Shenzhen branch: Shenzhen Xucheng Electronic Commerce co.Ltd
Add: 8-15 Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
